Clutch-actuating mechanism for riveting-machines.



. V y R. JAY. y cLuTcH AcTuATING MEcHAN'xs/ Fon RlvETlNG MACHINES;`APPucATloN'Iman mma. ma.

' vPatented Apr. 27, 1915.

2 SHEETS-SHEET I.

s "A v Y y R. JAY.

CLUTCH ACTUATING MECHANISM FOR RIVETING MACHINES.

APPLICATION man 1m29, |913.

2 SHEETS-SHEET 2 WIT www @m1/'5mm' Patented Apr. 27, 1915.

RUDOLF JAY, OF LEIPZIG, GERMANY, ASSIGNOR T0 LEIPZIGER MASCHINENBA-GESELLSCHAFT 1VI. B. H., 0F LEIPZIG-SELLERHAUSEN, GERMANY.

CLUTCH-ACTUATING- MECHANISM FOR IRIVIE!lING-lvCIACI-IIN'IEISl Specicatonof Letters Patent.

Application Bled January 29, 1913. Serial N o. 7454,929.

1'0 ad whom tmay conce-rn Be it known that I, RUDOLF JAY, subject of theGerman Emperor, residing at 5 Karl- Tauchi'iitz strasse, Leipzig,Germany, have invented certain new and useful Improvements in(llutch-Actuating Mechanism for Riveting-ldachines, of which thefollowing is a specilication.

lOrdinarily electrically driven riveting machines, in which the linkmechanism is actuated by means of a worm and a worm wheel, are providedwith a clawcouplingbetween worm wheel and crank shaft in addition totheswitch for the motor. The claw coupling alone is not however suiiicientfor insuring a stopping 'period of the die remaining under pressure onthe rivet until the rivet has become cold. If the link mechanism `isstraightened that is if the crank is in its dead center position, theworkman has to release the claw coupling, and after the cooling f therivet to engage the coupling again for the return stroke of the die. Onthe completion of the return stroke of the die or in the other deadcenter position of the crank, the link mechanism must again b e thrownout of gear in order to allow of the insertion of the rivet. Thus, thecoupling must be connected and disconnected twice for each rivet set.

Whereas it is usual for overcoming the aforesaid diiculties to employ anelectromagnet coupling and-electric controlling system, the presentinvention relates to an automatic controlling apparatus, wherein onlymechanical means are employedfor the timely control of the connectionand disconnection of the crank disk drive. The mechanism to be employedin connection with an ordinary claw coupling is such that for connectingthe coupling, the workman attending to the machine need only release apawl, whereupon the connection of the coupling, takes placeautomatically. The uncoupling subsequently takes place againautomatically in the dead center position while a stop of the crank diskreturns the parts to the initial position. By means of this newcontrolling mechanism, the attendance of the machine'is very simple andabsolutely reliable for the function thereof.

A constructional form of the improved controlling mechanism in ariveting machine is shown by way of example in different elevations inthe accompanying drawing.

Figure l is a side elevation of that part of the mechanism whichembodies the invention, Fig. 2 is a section taken on the line of Fig. l,Fig. 3 is a front elevation of the riveting machine gear with control,Fig. 4 is a plan, the upper half of the casing not being shown and theworm wheel shown Patented Apr. 2?, 191th.A

in section, Fig. 5 is a vertical section show- I ing the fork shaft of'the coupling device mounted in the lower casing, Fig. 6 shows thecontrolling pawl carrying member in a detail view and Fig. 7 shows theside elevation .of the whole riveting machine, as 'seen from the sideofthe crank disk,vreverse l to Fig. 1, the said disk being provided withthe rollers mounted thereon and serving for the positive uncoupling ofthe claw coupling. The general construction of the riveting machine isshown Vin Fig. 7, in which, however, with the exception of the stops 24and the rocking lever 12, nov essential parts of the hereinafterdescribed new mechanism are to be seen. -The crank disk 7, whichcorresponds to the crank disk 7 on the opposite side (Figs. 1, 2 and 3)carries like the latter a crank pin 8 to which the arm a is connected,which forms one member of the pair of connected actuating arms a b.AOwing to thel actuating mechanism engaging with the movable die c., theriveting die is expressed by a cam Zin the usual manner. l

According to the construction shown, the,y

drive is assumed as being derivedfrom. an electric motor e. Thel shaft 1v(F ig. l) can' also be rotated by belt gear or another m0- tor. Theshaft 1 bears a sleeve having a i means of connecting' rods the wellknown actuating mechanism, which is shown in Fig.

7 of the drawing. The shaft 91of the coupling lever (Fig. 5) Vcarries afork 10, on

Whose shank ends are mounted\.the slideV blocks 11,l which engage in thegroove of the coupling sleeve 5. This disconnecting device is known perse, while the controlling v arrangement for the automatic connection anddisconnection is new.

'There is'mounted on the shaft 9 a two armed lever 12 (Fig. 3), whoseone end is connected by a rod 13 tol the controlling member shown inFig. 6. The linked rod 13 has an elongated hole for' receiving the bolt14 secured' to the controlling member. A spring 15 is mounted about theextended end of the rod 13 acting between a nut 30 on the end of the rodand a` stool 31 mount- 15 ed on the pivot shaft 14. The connectionbetween the linked rod 13 and the bolt 14 is not rigid but elastic in acertain sense.

The controlling' switch device f, as "shown in Fig. 6, is a memberpivotally mounted onv the bearing hub of the A'worm wheel casing 16,being in a measure interposed between 1 casing and the crank disk 7,said hub being encircled by a collar similar to an eccentric ring. Thereis provided between the worm wheel casing 16 and thecontrolling member,

a pressure spring 17'wlich is mounted on a guide 18 and bearsagainst'abesson the,

casing 16 and a nut on the guide 18. The

controlling member has also the pawl 19,`

.30 which can be lifted by means of a handle 20. The stop 21 serves,when desired, for arresting the pawl 19 in its raised position, having amember21 adapted to'engage a cut out portion 19 on the pawl 19. On thecrank disk 7 are mounted the stops 22 against which bear the pawl 19 and,the stop 23 secured to the worm wheel casin 16. Two oppositely situatedlrollers 24 are mounted on thecrank disk 7a.

The operation of the herein described mechanism is as follows: Whenworking, thel worm and worm'wheel 2 are in constant rotation. If thecoupling 4 5 and 6- provided between lthe worm wheel 2 and crank shaft 3is to be thrown.. into gearor connected, the pawl 19 is raised by meansof the handle 20 to such an extent that the 'pawl can slide over thestop 22.' After the pawli 19 is raised, the pressure spring 17 acts andcauses the controlling member f to shift on its bearing. Through thisrotation, however, the lever 12 and the clutch operating shaft 9 withthe coupling fork 10 are rocked by means' of the linked rod 13, so thatat the proper time the claws 6 and sleeve 5 engage with the claws 4 ofthe worm wheel 2. The crank shaft with the two crank disks nowparticipate in the rotation .of the worm wheel. The action of the spring17 is not G0 complete as the cou ling claws only partially intermesh,and) to complete this en- Y gagement the cams 24 on the crank disk 7a"and the projecting lever arm 12a forming a tail of the lever 12 havebeen provided. The cam 24 moving from the lever arm 12a imparts afurther motion to the lever 12 until parts of the clutch thoroughlyengage. This latter arrangement forms a very important point or featureof the new construction, because it insures the connection of thecouplin After the crank disk has made a half revo ution, the stop 22bears against the pawl 19 and positively returns the controlling memberto its initial position. By this movement, however, the coupling isagain thrown out of gear 7l. e. released by means of the'rodl, lever 12,reversing shaft 9 and the disengaging fork mounted thereon. In order,however, to render the releasing of the couplingv complete so that a fewmillimeters of play or clearance remain between the front faces of theclaws z'. e. that the front faces of the claws of both halves of thecouplin do not slide on each other and cannot e ect by friction anunintentional rotation of the crank mechanism, the

*said tension will be suiiicient for permitting the coupling sleeve tobe drawn back to the l extent of about 1-2 mm. Besides the arrangementfor automatic disconnection, the arrangement of an elastic intermediatemember with play or clearance at 14 for effecting an absolutely reliabledisconnection forms an Iessential feature within the scope of thepresent invention. Simultaneously with the aforesaid disconnection, thespring 17 is also tensioned again., vso that it is only necessary tolift the pawl 19 for connecting the mechanism again. The index 23mounted on the worm wheel casing is adapted to secure the crankmechanism-with which the usual mechanism engages-in its actual deadcenter position, because in the case of a varied suspension of themachine, the wei hts of the toggle joint mechanism might a so ei'ect arotation of the crank disk without the coupling being connected or inengagement. The whole arrangement is such that the con. nection anddisconnection .of the coupling and the stoppage of the crank disk canonly take place 1n the two dead center positions of the crank disk.There are thus four points, which constitute the advantages of the newconstruction: Dispensing with the skill of the workman for theattendance of the machine, as the workman need only release the pawl19.' As the worm wheel e. one half of the coupling is in constant rotation, the coupling is automatically connected at the proper moment sothat the members tion. An automatic disconnection also'talzes" menaceplace exclusivel in the two dead center positions, there y insu anabsolutely reliable disconnection and preventing the front faces of thecoupling `jaws from sliding on one another. Finally, it is possible ktosecure the crank disks and the toge joint mechanism in the positions ofres the stop 23.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, l declare thatwhat l claim and wish to secure by Letters Patent is:

1. ln a controlling mechanism for powerdriven riveting machines thecombination with a shaft of a two part clutch mounted thereon one of theparts of said clutch being keyed to said shaft, the parts of said clutchbemg normally disengaged a spring adapted to cause the parts of saidclutch to partially engage and cam means for insuring the completion 'ofsaid engagement as and for the purpose described.

2. ln a controlling mechanism for power driven riveting machines acasing a shaft within said casing and having an end pro-,

truding therethrough a two art clutch mounted on said shaft, means orrotating one part of said clutch freelyabout said shaft,`the othermember of saidclutch being feathered to the shaft and adapted to lillshift longitudinally thereon, a lever for shiftin said feathered memberof the clutch into an` Aout of engagement with the rotatable memberthereof, a crank disk mounted on the protruding end of said shaft, acontrolling member, spring means for shifting said controlling member,means connecting the clutch operating lever-with the controlling memberwhereb the shifting of said controlling member y `said spring causes theparts of said clutch to engage and automatic means forreturning thecontrolling member to its normal position against-the action of saidspring.

3. ln a controlling'mechanism for powerdriven riveting machines thecombination with a shaft of a, two part clutch mounted thereon one ofthe parts of said clutch being keyed to said shaft, the parts of saidclutch being'normally disengaged a spring adapted tocause the parts ofsaid clutch to partially engage, and cam means for insurlng thecompletion of said engagement said cam means operatin after theoperation of said spring, as an for the purpose described.

ln testimon whereof l ax my signature in presence o two witnesses.

RUDOLF JAY.

itnesses:

Rnnonrn Fnlonn, DORIS l'. v:. t.

